Raymarine e127 User Manual

30.7Sonarcrosstalkinterference
Thereare2typesofpotentialsonarcrosstalk
interferenceinaRaymarinesonarsystem:
1.SideVisionsonarcrosstalkinterference
2.Multiplesonarcrosstalkinterference
Thetypesofcrosstalkinterferencethatyou
mayexperienceinyoursystemdependonthe
combinationandtypeofsonarequipmentinstalled,
andthewayinwhichtheequipmenthasbeen
installed.
SideVisionsonarcrosstalk
interference
Multiplesonarcrosstalk
interference
Duetothehighsensitivity
ofSideVisiontransducers,
youmayexperiencesome
minorcrosstalkinterference
betweentheleftandright
receivingchannelsinareas
ofstrongtargetreturns.
Examplesofstrongtarget
returnsincludesolidobjects
suchasunderwaterbridge
structure.Thisinterference
showsupintheFishnder
applicationassubtle
reectionsfromtheright
sonarimagedisplayedin
theleftsonarimage,orvice
versa.
Whenusingmultiplesonar
modulesandtransducers
operatinginoverlapping
frequencyranges,youmay
experiencesomecrosstalk
interferencebetweenthe
ranges.Thisinterferenceis
displayedintheFishnder
applicationasvertical“rain
drops”throughoutthewater
column.Thesevertical“rain
drops”indicatethat2sonar
modulesareoperatingin
closefrequencyproximityto
oneanother.
SideVisionsonarcrosstalkinterference
Crosstalkinterferenceisexpectedbehaviorinahigh
sensitivitydevicesuchasaSideVisiontransducer,
andisnotindicativeofafaultwithyourtransduceror
sonarmodule.
Reducingmultiplesonarcrosstalk
interference
Crosstalkinterferenceinsystemswithmultiplesonar
modulesandtransducersistheresultofanumber
offactors,includinginstallation,operation,and
environment.
•Chooseanequipmentcombinationthat
minimizesoverlappingfrequencies.Wherever
possible,choosetousesonarmodulesand
transducersthatoperateindifferentfrequency
ranges(“Channels”),forexampleCP100and
CP300sonarmodulesandCPT-100andB744V
transducers.Thiswillhelptoensurethateach
componentisoperatinginadistinctrelative
frequencyrange–forexample,a“high”frequency
rangefortheCP100anda“low”frequencyrange
fortheCP300.
•Onlyusethesonarchannelsthatyoureally
need.Althoughitispossibletorunmultiplesonar
modulessimultaneouslyinaRaymarinesystem,it
maynotalwaysbenecessarytodoso.Ifyouare
inascenariothatrequiresonlyonesonarmodule
tobeactiveatatime,disableanyothersonar
modulesbychangingtheFishnderapplication
panetoasingleonewhichonlydisplaystheoutput
fromonesonarmodule.Alternatively,disablethe
pingforanyunusedsonarmodulesbyselecting
MENU>Channel>Ping>OFFintheFishnder
application.
•Identifythesonarmoduleandtransducerthat
iscausingtheinterference.Todothis,disable
thepingorremovethepowerforoneofthesonar
modulesinyoursystem.Iftheinterferenceinthe
Fishnderapplicationdisappearsimmediately,
younowknowwhichdeviceiscausingthe
interference.Iftheinterferencedoesn’tdisappear,
repeattheexerciseagainwiththeothersonar
module(s)inyoursystem,oneatatime.Onceyou
knowwhichdeviceiscausingtheinterference,
proceedwiththefollowingmethodstoreducethe
interferencefromtherelevantdevice.
•AdjusttheInterferenceRejectionFilter.The
defaultsettingforallRaymarineMFDsis“Auto”.
Changingthissettingto“High”mighthelpto
reduceinterference(MENU>Setup>Sounder
Setup>InterferenceRejection).Notethatthe
InterferenceRejectionFiltersettingisnotavailable
forallsonarmodules.
•Decreasethepoweroutputoftheinterfering
transducer.Adjustingthe“PowerMode”in
theSensitivitySettingsintheMFD’sFishnder
applicationcanhelptominimizethepresence
ofcrosstalkinterference(MENU>Sensitivity
Settings>PowerMode).NotethatthePower
Modesettingisnotavailableforalltransducers.
•EnsurethatyouhaveacommonRFground
pointforallelectricalequipmentonyour
vessel.OnvesselswithoutanRFgroundsystem,
ensureallproductdrainwires(whereavailable)
areconnecteddirectlytothenegativebattery
terminal.IneffectiveRFgroundingcancause
electricalinterferencewhichmayinturnresultin
sonarcrosstalkinterference.
•Increasethephysicaldistancebetweenyour
sonarmodules.Electricalinterferencemaybe
occurringbetweenacableononesonarmodule,
andacableonadifferentsonarmodule.Ensure
thatyoursonarmodulesarephysicallylocatedas
farawayfromeachotheraspossible.
•Increasethephysicaldistancebetweenyour
sonartransducers.Electricaland/oracoustic
interferencemaybeoccurringbetweenthe
differenttransducersinyoursystem.Ensurethat
yourtransducersarephysicallylocatedasfar
awayfromeachotheraspossible.
Note:Giventheeffortandpotentialdifculties
involvedinrelocatingsonarequipment,itshould
onlybeconsideredasalastresortwhenyoujudge
theinterferencetobeasignicantproblemwhich
cannotberesolvedusingthemethodsdescribed
above.
Troubleshooting
411

Raymarine e127 Specifications

General

Display Size	12.1 inches
Display Resolution	1280 x 800 pixels
Touchscreen	Yes
Wi-Fi	Yes
Bluetooth	No
Chartplotter	Yes
Radar Compatible	Yes
AIS Compatible	Yes
Display Type	LCD
Waterproof Rating	IPX6
GPS	Yes
Networking	RayNet Ethernet
Sonar	Optional, requires external sonar module
Operating Voltage	12/24 V DC
Fishfinder	Yes, with optional sonar module
Cartography	Navionics, C-MAP
Power Supply	12/24V DC